Improvement in picture-holders for stereoscopes



1. L'. BATES. VPicture-Holders for Stercuscupes..

Patented June 9,1874.

UNITED STATES PATENT OFFICE.

JOSEPH L. BATES, OF BOSTON, MASSACHUSETTS.

IMPROVEMENT IN PICTURE-HOLDERS FOR STEREOSCOPES.

` Specification forming part of Letters Patent No. 151,745, dated'June9, 1874; application filed May 13, 1874.

To all whom it may concern:

Be it known that I, JOSEPH L. BATES, of Boston, of the county of Sui'olkand State of Massachusetts, have invented a new and useful Improvementin the Stereoscope; and do hereby declare the same to be fully describedin the following specification and represented in the accompanyingdrawings, of wliich- 1 Figure l is a top View, Fig. 2 a side elevation,and Fig. 3 a perspective view, of a stereoscope having my improvement.

My invention relates to the pctureslide, which, heretofore, hasconsisted of a single bar of wood and two wire staples projecting upfrom it near its ends, each staple near its upper end being bent over ata right angle to the vertical parts of the legs. Such a slide is usuallycalculated for supporting` at once but one picture, which has to beinserted into the staples or withdrawn from them vertically. My improvedslide or picture-supporter is calcnlated to support at once a pack ofpictures, and to admit of each of them to be withdrawn from it, orplaced upon it, endwise, such being much more convenient to an observerwhile using the instrument.

In the drawing, A denotes the bar 5 B, the lens-carrier; C, theeye-shield; D, the handle, and E the screen, applied and arranged as inmost stereoscopes. F is the picture supporter or slide, which, in thiscase, consists of a horizontal plate er board, a, a Vertical board orrest, b, and a wire, o, all being arranged as shown. The said wire, bentat right angles and inserted at one end in the board b, and at the otherin the plate a,'at or in close proximity with their two next adjacentends, answers as a gage or stop for the pictures, which, when in properpositions, will at one end of each abut against the horizontal part ofthe wire. The said slide straddles the bar A, and is provided with-afriction-spring, d, having a knob, e, all being such as are commonlyused with the slides of stereoscopes.

I claim- In the stereoscope, the improved picture slide or supporter F7composed of the two boards a. b and the single gage c, arranged asspecified and represented.

A JOSEPH L. BATES.

Witnesses:

LANGDON S. WARD, J. It. SNOW.

